ci-check-bundle-size.yml

name: Check Binaries bundle size

on:
  push:
    branches: [main]

  pull_request:
    branches: [main]

concurrency:
  group: ${{ github.workflow }}-${{ (github.event.pull_request && github.event.pull_request.number) || github.ref || github.run_id }}
  cancel-in-progress: true

# See https://github.com/ossf/scorecard/blob/main/docs/checks.md#token-permissions
permissions:
  contents: read

jobs:
  build-and-check:
    runs-on: ubuntu-latest
    steps:
    - uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
      with:
        egress-policy: audit 

    - uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938 # v4.2.0
      with:
        submodules: true

    - name: Fetch git tags
      run: |
        git fetch --prune --unshallow --tags

    - uses: actions/setup-go@3041bf56c941b39c61721a86cd11f3bb1338122a # v5.2.0
      with:
        go-version: 1.23.x

    - name: Setup Node.js version
      uses: ./.github/actions/setup-node.js

    - name: Build jaeger binary
      run: make build-jaeger

    - name: Calculate bundle size
      run: |
        TOTAL_SIZE=$(du -sb ./cmd/jaeger/jaeger-linux-amd64 | cut -f1)
        echo "$TOTAL_SIZE" > ./new_bundle_size.txt
        echo "Total bundle size: $TOTAL_SIZE bytes"
        
    - name: Restore previous bundle size
      id: cache-bundle-size
      uses: actions/cache/restore@1bd1e32a3bdc45362d1e726936510720a7c30a57      #v4.2.0
      with:
        path: ./bundle_size.txt
        key: bundle-size-jaeger-linux-amd64

    - name: Compare bundle sizes
      if: steps.cache-bundle-size.outputs.cache-hit == 'true'
      run: |
        OLD_BUNDLE_SIZE=$(cat ./bundle_size.txt)
        NEW_BUNDLE_SIZE=$(cat ./new_bundle_size.txt)
        echo "Previous bundle size: $OLD_BUNDLE_SIZE bytes"
        echo "New bundle size: $NEW_BUNDLE_SIZE bytes"
        
        SIZE_CHANGE=$(( $NEW_BUNDLE_SIZE - $OLD_BUNDLE_SIZE ))
        PERCENTAGE_CHANGE=$(( SIZE_CHANGE * 100 / $OLD_BUNDLE_SIZE ))
        echo "Size change: $PERCENTAGE_CHANGE%"
        if [ $PERCENTAGE_CHANGE -gt 2 ]; then
          echo "❌ Bundle size increased by more than 2% ($PERCENTAGE_CHANGE%)"
          exit 1
        else
          echo "✅ Bundle size change is within acceptable range ($PERCENTAGE_CHANGE%)"
        fi
 

    - name: Remove previous *_bundle_*.txt
      run: |
        rm -rf ./bundle_size.txt
        mv ./new_bundle_size.txt ./bundle_size.txt
      
    - name: Save new bundle size
      if: github.event_name == 'push' && github.ref == 'refs/heads/main'
      uses: actions/cache/save@1bd1e32a3bdc45362d1e726936510720a7c30a57     #v4.2.0
      with:
        path: ./bundle_size.txt
        key: bundle-size-jaeger-${{ matrix.os }}-${{ matrix.arch }}